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Research for magnetic core performance of sensor for power equipment magnetic field detection

A magnetic field sensor and power equipment technology, applied in magnetic performance measurement, instruments, measuring devices, etc., can solve problems such as complex detection methods and processes, reliability and sensitivity improvement, and achieve the effect of improving sensitivity and maintaining safety and stability

Pending Publication Date: 2020-11-06
TIANJIN UNIV
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Problems solved by technology

However, all scholars are based on the detection method of the electric field. Although the traditional detection method based on the electric field can detect the aging, defects and faults of the cable, the detection method and process are relatively complicated, and the reliability and sensitivity of the detection have yet to be determined. promote

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  • Research for magnetic core performance of sensor for power equipment magnetic field detection
  • Research for magnetic core performance of sensor for power equipment magnetic field detection
  • Research for magnetic core performance of sensor for power equipment magnetic field detection

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Embodiment Construction

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0028] 1. Analysis of the influence of the ratio of the cross-sectional area of ​​the magnetic core to the length on the relative effective permeability:

[0029] In the simulation software, five cuboid magnetic cores with different cross-sectional area and length ratios and the same volume are established. The length, width and height specifications of these cuboid cores are as follows: the lengths of the five cores (dimensions in...

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Abstract

According to the invention, a magnetic core model is constructed through finite element simulation software COMSOL, the influence of the magnetic core on the sensor is researched from two aspects of the ratio of the sectional area to the length of the magnetic core and the length of the magnetic core, the relational expression between the relative effective magnetic conductivity of the center position of the magnetic core and the ratio of the sectional area to the length of the magnetic core is obtained, the relational expression between the relative effective magnetic conductivity of the geometric center of the magnetic core and the length of the magnetic core is also obtained, and a theoretical basis is provided for design of sensor magnetic cores. The research has great significance formaintaining stable operation of the power cable, discovering and overhauling faults of the power cable in time and maintaining safe and stable operation of a power grid in China.

Description

technical field [0001] The invention relates to a method for detecting the magnetic field around electric equipment, wherein the performance of the magnetic core of the magnetic field sensor is analyzed. Background technique [0002] With the development of my country's economy and the advancement of urbanization, the number and scale of cities in our country are increasing day by day. In order to beautify the appearance of the city, save the space of the city, and reduce the land occupation of the transmission corridor, the urban power grid achieves these goals by using cable lines instead of overhead transmission lines, and the application range of power cables is becoming wider and wider. Since the power cables are installed in the underground environment, harsh factors such as underground corrosion and humidity make the power cables prone to aging and failure. Moreover, power cables are mostly laid in tunnels, trenches, direct burial, etc., which brings inconvenience to...

Claims

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Application Information

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IPC IPC(8): G01R33/12
CPCG01R33/1223G01R33/12G01R33/1284
Inventor 刘勇黄兴旺宗红宝李琪冉董学家王志会王豪
Owner TIANJIN UNIV
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